<h2>Demo Pipe</h2>

<h4>内置管道</h4>
<p>生日时间: {{ birthday | date:"yyyy/MM/dd" }} </p>

<h4>自定义管道</h4>
<div>power: <input [(ngModel)]="power"></div>
<div>factor: <input [(ngModel)]="factor"></div>
<p>指数算法: {{power | exponentialStrength: factor}}</p>